PCB for PCM2902 (digital out)

[00940]

I've sent my pcb to the hell of the forgotten designs btw. I am currently working on a modular dac. A section for coax, optical and usb input, a section for the dac itself and a section for the I/V. I hope to fit each section in 1/3 of an eurocard (50/103mm). I've only finished the usb input though

 

[walangalam]

00940,

any chance of the usb->i2s ? This is what I really need...

 

[00940]

Don't want to hijack this thread, i'll continue in another. To answer : no direct USB to I2S, but USB-SPDIF-isolation transformer-SPDIF receiver-I2S. I want a way to completly isolate the pc from the dac itself and it's not practical with I2S.

 

[dsavitsk]

Quote:

Originally Posted by 00940 I've sent my pcb to the hell of the forgotten designs btw.

Even so, I'd like to thank you for the effort you put into this project. If you hadn't stepped up and done the work you did I doubt it would have taken off like it has.

-d

 

[halman]

>>Glasman

I got it from JWB over at diy its in the cheap cs4122 thread should you want/need it.


>> everyone else

This baby is 35x43mm and after one final check when I have got some sleep I will send it of to production.

 

[00940]

Halman : same point. I suppose those TO92 things are regulators ? Why a regulation of VCCCI without analog section's use ?

 

[halman]

It wouln't make my board any smaller if I removed it so it might aswell stay. You are right however.

 

[KARMAZ]

Hi
too many crossed project here... what a shame!
Very interesseted but very difficult for me (I'm not fluent in English) to follow this thread.
Is it possible to make ONE modular project (unpopulated) or a full project and many simple ?
An make a summary/status on the first page.
Thnks for these great contributions, nice project at all.

 

[robzy]

Quote:

Originally Posted by halman It wouln't make my board any smaller if I removed it so it might aswell stay. You are right however.

I am fairly new to this - but why would you bother adding regulation for parts of the chip that arent in use? Whether it adds to board size or not all it does is add more parts to go wrong that dont actually do anything in the first place.

Rob.

 

[TV Man]

How do we sign up for boards?

Nice job on the design. I'd like a few of these to play with

 

[dsavitsk]

Just to keep this rolling

We've passed the revision deadline. Any thought on kits? My sense would be that since parts are easily sourcable from digikey and cost just enough to not incur the handling charge, that at least for those of us in the States we not bother with kits. It doesn't really save anyone any money (save for resistors coming in set of 10 in some cases) and just requires a great deal of sorting on sombody's part.

-d

 

[guzzler]

I'm still happy to order boards; assuming Halman hasn't gone ahead with his; if he has; well his are fine

More orders, the cheaper it is

Please could you PM me; or email me regards if you want one (pending Halman of course)

g

PS; what's the consensus on the regulator? The boards not really going to be any smaller without it, and I'm not entirely sure how it will affect the overall operation (could even squeeze some analog pads in possibly)

 

[halman]

I did go ahead with mine, but I only ordered a few sets of boards, with different line drivers. (one pair of each actually) I will have them in a few weeks time or so. It will be fun to se wich will work best..if there will be a noticable difference at all ,)

The board was made to cater to my own personal needs (BNC connector /galvanic isolation) So i.e it is less universal and thus less suitable for a group buy effort.

 

[clarke68]

Is anybody working on a reference-quality usb/spdif pcb? Something along the lines of the modded M-Audio Transit over at Empirical Audio, that will rival mega-buck dedicated transports.

I still may pick up a few of these (especially after reading dsavitsk's glowing review of Guzzler's last project), but I'd be interested in a more 'no holds barred' version.

 

[Magsy]

Quote:

Originally Posted by clarke68 Is anybody working on a reference-quality usb/spdif pcb? Something along the lines of the modded M-Audio Transit over at Empirical Audio, that will rival mega-buck dedicated transports. I still may pick up a few of these (especially after reading dsavitsk's glowing review of Guzzler's last project), but I'd be interested in a more 'no holds barred' version.

Same here, I would like to build a high end usb dac!

edit: woops, you say usb>spdif, I'm after usb>analog!